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                        什么是函数
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                        函数的参数
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                            <b>4.</b>
                        
                        函数的返回值
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                        函数调用函数
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                            <b>8.2.</b>
                        
                        函数返回值详解
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                        可变数据类型和不可变数据类型
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                        <h2 id="&#x51FD;&#x6570;&#x8FD4;&#x56DE;&#x503C;&#x4E00;">&#x51FD;&#x6570;&#x8FD4;&#x56DE;&#x503C;(&#x4E00;)</h2>
<h3 id="&#x4E00;&#x3001;&#x8FD4;&#x56DE;&#x503C;&#x4ECB;&#x7ECD;">&#x4E00;&#x3001;&#x201C;&#x8FD4;&#x56DE;&#x503C;&#x201D;&#x4ECB;&#x7ECD;</h3>
<p>&#x73B0;&#x5B9E;&#x751F;&#x6D3B;&#x4E2D;&#x7684;&#x573A;&#x666F;:</p>
<blockquote>
<p>&#x6211;&#x7ED9;&#x513F;&#x5B50;10&#x5757;&#x94B1;&#xFF0C;&#x8BA9;&#x4ED6;&#x7ED9;&#x6211;&#x4E70;&#x4E2A;&#x51B0;&#x6DC7;&#x6DCB;&#x3002;&#x8FD9;&#x4E2A;&#x4F8B;&#x5B50;&#x4E2D;&#xFF0C;10&#x5757;&#x94B1;&#x662F;&#x6211;&#x7ED9;&#x513F;&#x5B50;&#x7684;&#xFF0C;&#x5C31;&#x76F8;&#x5F53;&#x4E8E;&#x8C03;&#x7528;&#x51FD;&#x6570;&#x65F6;&#x4F20;&#x9012;&#x5230;&#x53C2;&#x6570;&#xFF0C;&#x8BA9;&#x513F;&#x5B50;&#x4E70;&#x51B0;&#x6DC7;&#x6DCB;&#x8FD9;&#x4E2A;&#x4E8B;&#x60C5;&#x6700;&#x7EC8;&#x7684;&#x76EE;&#x6807;&#xFF0C;&#x6211;&#x9700;&#x8981;&#x8BA9;&#x4ED6;&#x628A;&#x51B0;&#x6DC7;&#x6DCB;&#x5E26;&#x56DE;&#x6765;&#xFF0C;&#x6B64;&#x65F6;&#x51B0;&#x6DC7;&#x6DCB;&#x5C31;&#x662F;&#x8FD4;&#x56DE;&#x503C;</p>
</blockquote>
<p>&#x5F00;&#x53D1;&#x4E2D;&#x7684;&#x573A;&#x666F;&#xFF1A;</p>
<blockquote>
<p>&#x5B9A;&#x4E49;&#x4E86;&#x4E00;&#x4E2A;&#x51FD;&#x6570;&#xFF0C;&#x5B8C;&#x6210;&#x4E86;&#x83B7;&#x53D6;&#x5BA4;&#x5185;&#x6E29;&#x5EA6;&#xFF0C;&#x60F3;&#x4E00;&#x60F3;&#x662F;&#x4E0D;&#x662F;&#x5E94;&#x8BE5;&#x628A;&#x8FD9;&#x4E2A;&#x7ED3;&#x679C;&#x7ED9;&#x8C03;&#x7528;&#x8005;&#xFF0C;&#x53EA;&#x6709;&#x8C03;&#x7528;&#x8005;&#x62E5;&#x6709;&#x4E86;&#x8FD9;&#x4E2A;&#x8FD4;&#x56DE;&#x503C;&#xFF0C;&#x624D;&#x80FD;&#x591F;&#x6839;&#x636E;&#x5F53;&#x524D;&#x7684;&#x6E29;&#x5EA6;&#x505A;&#x9002;&#x5F53;&#x7684;&#x8C03;&#x6574;</p>
</blockquote>
<p>&#x7EFC;&#x4E0A;&#x6240;&#x8FF0;&#xFF1A;</p>
<ul>
<li>&#x6240;&#x8C13;&#x201C;&#x8FD4;&#x56DE;&#x503C;&#x201D;&#xFF0C;&#x5C31;&#x662F;&#x7A0B;&#x5E8F;&#x4E2D;&#x51FD;&#x6570;&#x5B8C;&#x6210;&#x4E00;&#x4EF6;&#x4E8B;&#x60C5;&#x540E;&#xFF0C;&#x6700;&#x540E;&#x7ED9;&#x8C03;&#x7528;&#x8005;&#x7684;&#x7ED3;&#x679C;</li>
<li><strong>&#x4F7F;&#x7528;&#x8FD4;&#x56DE;&#x503C;&#x7684;&#x524D;&#x63D0;&#x9700;&#x6C42;&#x5C31;&#x662F;&#x51FD;&#x6570;&#x8C03;&#x7528;&#x8005;&#x60F3;&#x8981;&#x5728;&#x51FD;&#x6570;&#x5916;&#x4F7F;&#x7528;&#x8BA1;&#x7B97;&#x7ED3;&#x679C;</strong></li>
</ul>
<h3 id="&#x4E8C;&#x3001;&#x5E26;&#x6709;&#x8FD4;&#x56DE;&#x503C;&#x7684;&#x51FD;&#x6570;">&#x4E8C;&#x3001;&#x5E26;&#x6709;&#x8FD4;&#x56DE;&#x503C;&#x7684;&#x51FD;&#x6570;</h3>
<p>&#x60F3;&#x8981;&#x5728;&#x51FD;&#x6570;&#x4E2D;&#x628A;&#x7ED3;&#x679C;&#x8FD4;&#x56DE;&#x7ED9;&#x8C03;&#x7528;&#x8005;&#xFF0C;&#x9700;&#x8981;&#x5728;&#x51FD;&#x6570;&#x4E2D;&#x4F7F;&#x7528;return</p>
<p>&#x5982;&#x4E0B;&#x793A;&#x4F8B;:</p>
<pre><code class="lang-python"><span class="hljs-function"><span class="hljs-keyword">def</span> <span class="hljs-title">add2num</span><span class="hljs-params">(a, b)</span>:</span>
    c = a+b
    <span class="hljs-keyword">return</span> c  <span class="hljs-comment"># return &#x540E;&#x53EF;&#x4EE5;&#x5199;&#x53D8;&#x91CF;&#x540D;</span>
</code></pre>
<p>&#x6216;&#x8005;</p>
<pre><code class="lang-python"><span class="hljs-function"><span class="hljs-keyword">def</span> <span class="hljs-title">add2num</span><span class="hljs-params">(a, b)</span>:</span>
    <span class="hljs-keyword">return</span> a+b  <span class="hljs-comment"># return &#x540E;&#x53EF;&#x4EE5;&#x5199;&#x8BA1;&#x7B97;&#x8868;&#x8FBE;&#x5F0F;</span>
</code></pre>
<h3 id="&#x4E09;&#x3001;&#x4FDD;&#x5B58;&#x51FD;&#x6570;&#x7684;&#x8FD4;&#x56DE;&#x503C;">&#x4E09;&#x3001;&#x4FDD;&#x5B58;&#x51FD;&#x6570;&#x7684;&#x8FD4;&#x56DE;&#x503C;</h3>
<p>&#x5728;&#x672C;&#x5C0F;&#x8282;&#x521A;&#x5F00;&#x59CB;&#x7684;&#x65F6;&#x5019;&#xFF0C;&#x8BF4;&#x8FC7;&#x7684;&#x201C;&#x4E70;&#x51B0;&#x6DC7;&#x6DCB;&#x201D;&#x7684;&#x4F8B;&#x5B50;&#x4E2D;&#xFF0C;&#x6700;&#x540E;&#x513F;&#x5B50;&#x7ED9;&#x4F60;&#x51B0;&#x6DC7;&#x6DCB;&#x65F6;&#xFF0C;&#x4F60;&#x4E00;&#x5B9A;&#x662F;&#x4ECE;&#x513F;&#x5B50;&#x624B;&#x4E2D;&#x63A5;&#x8FC7;&#x6765; &#x5BF9;&#x4E48;&#xFF0C;&#x7A0B;&#x5E8F;&#x4E5F;&#x662F;&#x5982;&#x6B64;&#xFF0C;&#x5982;&#x679C;&#x4E00;&#x4E2A;&#x51FD;&#x6570;&#x8FD4;&#x56DE;&#x4E86;&#x4E00;&#x4E2A;&#x6570;&#x636E;&#xFF0C;&#x90A3;&#x4E48;&#x60F3;&#x8981;&#x7528;&#x8FD9;&#x4E2A;&#x6570;&#x636E;&#xFF0C;&#x90A3;&#x4E48;&#x5C31;&#x9700;&#x8981;&#x4FDD;&#x5B58;</p>
<p>&#x4FDD;&#x5B58;&#x51FD;&#x6570;&#x7684;&#x8FD4;&#x56DE;&#x503C;&#x793A;&#x4F8B;&#x5982;&#x4E0B;:</p>
<pre><code class="lang-python"><span class="hljs-comment">#&#x5B9A;&#x4E49;&#x51FD;&#x6570;</span>
<span class="hljs-function"><span class="hljs-keyword">def</span> <span class="hljs-title">add2num</span><span class="hljs-params">(a, b)</span>:</span>
    <span class="hljs-keyword">return</span> a+b

<span class="hljs-comment">#&#x8C03;&#x7528;&#x51FD;&#x6570;&#xFF0C;&#x987A;&#x4FBF;&#x4FDD;&#x5B58;&#x51FD;&#x6570;&#x7684;&#x8FD4;&#x56DE;&#x503C;</span>
result = add2num(<span class="hljs-number">100</span>,<span class="hljs-number">98</span>)

<span class="hljs-comment">#&#x56E0;&#x4E3A;result&#x5DF2;&#x7ECF;&#x4FDD;&#x5B58;&#x4E86;add2num&#x7684;&#x8FD4;&#x56DE;&#x503C;&#xFF0C;&#x6240;&#x4EE5;&#x63A5;&#x4E0B;&#x6765;&#x5C31;&#x53EF;&#x4EE5;&#x4F7F;&#x7528;&#x4E86;</span>
print(result)
</code></pre>
<p>&#x7ED3;&#x679C;:</p>
<pre><code class="lang-python"><span class="hljs-number">198</span>
</code></pre>

                    
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